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A stream function solver for liquid simulations

Ryoichi Ando, Nils Thuerey, Chris Wojtan
2015 ACM Transactions on Graphics  
Previous methods have used stream function techniques for the simulation of detailed single-phase flows, but a formulation for liquid simulation has proved elusive in part due to the free surface boundary  ...  Figure 1 : Liquid streaming out of a closed container with holes. Our solver calculates the complex formation of bubbles without explicitly solving for the gas phase.  ...  Acknowledgements The first author was supported by a JSPS Postdoctoral Fellowship for Research Abroad.  ... 
doi:10.1145/2766935 fatcat:xy36rdwobfc27hewghx73rhdsa

CryoSolver. Package for cryogenic cycle simulation in Python. Documentation [article]

Sofiya Savelyeva, Steffen Klöppel, Christoph Haberstroh
2020 Zenodo  
The package does not offer a large variety of tools in contrast to the industrial software, but can be sufficient for research purposes.  ...  The CryoSolver offers a collection of classes and functions to automatically determine and solve the system of equations such as mass and energy balances to define the parameters at cycle points.  ...  and liquid streams to the inlet stream.  ... 
doi:10.5281/zenodo.4001667 fatcat:xueoeibthra6zcyfvlvyivf4te

Constraint Bubbles: Adding Efficient Zero-Density Bubbles to Incompressible Free Surface Flow [article]

Ryan Goldade, Christopher Batty
2017 arXiv   pre-print
Our method adds a new constraint to each disconnected air region that guarantees zero net flux across its entire surface, and requires neither simulating both phases nor reformulating into stream function  ...  Liquid simulations for computer animation often avoid simulating the air phase to reduce computational costs and ensure good conditioning of the linear systems required to enforce incompressibility.  ...  Ando et al. [2015] proposed a stream function-based approach for free surface ows which expresses the pressure projection problem in terms of a vector stream function.  ... 
arXiv:1711.11470v1 fatcat:yv7rnjzzafgallo673x3z6ytfq

Hybrid Particle-grid Modeling for Multi-scale Droplet/Spray Simulation

Lipeng Yang, Shuai Li, Aimin Hao, Hong Qin
2014 Computer graphics forum (Print)  
to dissipating spray and their natural mixture and transition, originated from a violent (high-speed) liquid stream.  ...  natural inter-transition among droplets, spray, and liquid stream.  ...  We also thank the anonymous reviewers for their constructive critiques.  ... 
doi:10.1111/cgf.12488 fatcat:xu5wz4abwvghdittu52aysjehq

Ultrasonic liquid metal processing: The essential role of cavitation bubbles in controlling acoustic streaming

G.S. Bruno Lebon, Iakovos Tzanakis, Koulis Pericleous, Dmitry Eskin, Patrick S. Grant
2019 Ultrasonics sonochemistry  
A B S T R A C T The acoustic streaming behaviour below an ultrasonic sonotrode in water was predicted by numerical simulation and validated by experimental studies.  ...  Simulations show a strong dependence of the acoustic streaming flow direction on the cavitating bubble volume fraction, reflecting PIV observations.  ...  Table 2 lists the discretization schemes and solver control parameters for the simulations. A summary of the solver algorithm is detailed below: 1.  ... 
doi:10.1016/j.ultsonch.2019.01.021 fatcat:yryhhkurfjczrgsj4qc4qkjhlu

Cumulus convection over land in cloud-resolving simulations with a coupled ray tracer [article]

Menno A. Veerman, Bart J. H. van Stratum, Chiel C. van Heerwaarden
2022 arXiv   pre-print
We used a case study over a grassland in the Netherlands to compare simulations with a coupled ray tracer to those with a conventional 2-stream solver, and to test ray tracer convergence.  ...  We present simulations of cumulus convection over land with shortwave radiation computed by a Monte Carlo ray tracer coupled to the flow solver.  ...  The simulations were carried out on the Dutch national e-infrastructure with the support of SURF Cooperative. The authors acknowledge help from the ESiWACE2 service call in improving the GPU  ... 
arXiv:2208.05247v2 fatcat:plmurvijszd3hcm4znl5ssd2uu

A General Column Model in CO2SIM for Transient Modelling of CO2 Absorption Processes

Finn Andrew Tobiesen, Magne Hillestad, Hanne Kvamsdal, Actor Chikukwa
2012 Energy Procedia  
solver.  ...  Emphasis has been on developing flexible coding architecture for further development into dynamics and for a sequential modular dynamic handling of information when incorporated into a dynamic network  ...  requirements A well defined implementation strategy and functionality had to be established for the dynamic simulator, based on the steady state version of CO2SIM.  ... 
doi:10.1016/j.egypro.2012.06.071 fatcat:p36bxogs5bbn3nnemihrxtps2a

Lattice-Boltzmann and Eulerian Hybrid for Solid Burning Simulation

Eunchan Jo, Byungmoon Kim, Oh-Young Song
2019 Symmetry  
It uses the LBM, which has symmetrical directions of particle velocities in a cell, for inside the solid fuel and the NSE, which has a representative velocity in a cell, for outside the solid.  ...  We propose a new hybrid simulation method to model burning solid interactions.  ...  Figure 2 . 2 Weighting function for temperature streaming. Figure 3 . 3 Wood burning simulation in 3D.  ... 
doi:10.3390/sym11111405 fatcat:e4lolamwabb2vmlrt7xwyt3gwy

3D radiative effects by shallow cumulus clouds on dynamic heterogeneities over a vegetated surface

M. A. Veerman, X. Pedruzo‐Bagazgoitia, F. Jakub, J. Vilà‐Guerau Arellano, C. C. Heerwaarden
2020 Journal of Advances in Modeling Earth Systems  
We couple a relatively fast 3-D radiative transfer approximation (TenStream solver) to the Dutch Atmosphere Large-Eddy Simulation (DALES) model and perform simulations of a convective boundary layer over  ...  One-dimensional radiative transfer solvers are computationally much more efficient than full three-dimensional radiative transfer solvers but do not account for the horizontal propagation of radiation  ...  Figure 7 . 7 Mean latent (a) and sensible (b) heat fluxes as a function of optical depth (τ) bin, averaged between 12 and 13 UTC and normalized by the clear sky (τ = 0) flux, for the 2-stream, 10-stream  ... 
doi:10.1029/2019ms001990 fatcat:6g3sma57h5b6vn5xr2w5rcrwvy


W. El-Saady, A. Ibrahim, A. Abdallah
2016 The International Conference on Applied Mechanics and Mechanical Engineering  
For more explanations of the internal flow inside the recoil system, the two-dimensional flow simulation is carried out using CFD solver. Dynamic mesh technique is used with the CFD solver.  ...  A user defined function (UDF) is developed to feed the solver by the recoil velocity with time. The coaxial tank gun recoil system is the current system under investigation.  ...  Figure 12 shows a comparison among the liquid pressures in space (1) with time according to CFD simulation results, MATLAB simulation results and experimental work measurements.  ... 
doi:10.21608/amme.2016.35172 fatcat:oscnxznpzzff5bnfqdmvt6cq4u

3-D radiative transfer in large-eddy simulations – experiences coupling the TenStream solver to the UCLA-LES

Fabian Jakub, Bernhard Mayer
2016 Geoscientific Model Development  
Compared to the widely employed 1-D delta-Eddington two-stream solver, the computational costs for the radiative transfer solver alone increases by a factor of 5–10.</p>  ...  The TenStream solver is tested for up to 4096 cores and shows a parallel scaling efficiency of 80–90<span class="thinspace"></span>% on various supercomputers.  ...  Many thanks to Bjorn Stevens and the DKRZ, Hamburg for providing us with the computational resources to conduct our studies. Edited by: K. Gierens  ... 
doi:10.5194/gmd-9-1413-2016 fatcat:kizhvi52yrarhcj7bu52rz2cve

3-D radiative transfer in large-eddy simulations – experiences coupling the TenStream solver to the UCLA–LES

F. Jakub, B. Mayer
2015 Geoscientific Model Development Discussions  
Compared to the widely employed 1-D δ-Eddington two-stream solver, the computational costs for the radiative transfer solver alone increases by a factor of five to ten.  ...  The TenStream solver is tested for up to 4096 cores and shows a parallel scaling efficiency of 80–90 % on various supercomputers.  ...  Many thanks to Bjorn Stevens and the DKRZ, Hamburg for providing us with the computational resources to conduct our studies. Edited by: K. Gierens  ... 
doi:10.5194/gmdd-8-9021-2015 fatcat:3wk2ul7alre5pktsmaapqzab7q

Current problems in scattering radiative transfer modelling for data assimilation

Ralf Bennartz, Tom Greenwald
2011 Quarterly Journal of the Royal Meteorological Society  
A numerically efficient method is proposed to determine beforehand whether scattering needs to be accounted for.  ...  Finally, model errors due to, for example, the assumption of plane-parallel RT are studied.  ...  Acknowledgements The authors would like to thank the editor and two anonymous reviewers for their excellent suggestions.  ... 
doi:10.1002/qj.953 fatcat:ayl7hvfcdzchhk4vs5hdkoxq64

Simulation of Uranyl Nitrate Crystallization Process in Linear Crystallizer Using Simsar Software

A Ochoa Bique, A Gozhimov, Yu Chursin, O Schmidt
2016 IOP Conference Series: Materials Science and Engineering  
The paper deals with simulation of linear crystallizer work process for the research of technic operating modes and searching the most effective for material's nano-purity achievement.  ...  At the present time a stand for refining of extraction and crystallization treatment process of spent nuclear fuel (SNF) is developing in Russia in the framework of "Proryv" project stream.  ...  SimSar software and Matlab Simulink are equal (Figure 6 equation solver and the one of simulation step.  ... 
doi:10.1088/1757-899x/142/1/012049 fatcat:yfbyzgbxencm3jxdok42fojp34

Restoring the missing vorticity in advection-projection fluid solvers

Xinxin Zhang, Robert Bridson, Chen Greif
2015 ACM Transactions on Graphics  
Most visual effects fluid solvers use a time-splitting approach where velocity is first advected in the flow, then projected to be incompressible with pressure.  ...  , losing energy noticeably for large time steps.  ...  Stock for inspiring discussions regarding the Barnes-Hut summation method for the open boundary condition, and the Natural Sciences and Engineering Research Council of Canada for supporting this research  ... 
doi:10.1145/2766982 fatcat:fvalpnjtlzfgrdhdxtxiblr7v4
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